Can't get into 4Lo NP203

[Stano]

Ok the subject line says it all. I built me a 83 1/2 ton 4x4 and i can't get my transfer case into 4 Lo. It is a NP203 with a TH350 infront of it. I can get 4 Hi,2Hi,N,2Lo but not into 4 Lo which sucks because I plan on USING this truck and Low range is a must. Is this a problem with the TC or ME? LOL I have tried several times to no avail. The pattern is like this:


Dash
4Lo
2Lo
N
2Hi
4Hi

Any advice is much appreciated, thanks.
Stano

[jeffspower]

The problem is most likely in the 203's shifter "box", the part that the shift lever comes out of. They are notorious junk, & usually not worth your time to try & fix. They are pretty much like a 3-spd column shifter, cleaning, oiling & adjusting might help- but only for a little while. GM discontinued new assemblies & parts years ago, & I don't think the aftermarket makes anything either. There are companies that make "twin stick" conversions.

[Stano]

Thanks Jeffspower. The action is nice and smooth actually and not sloppy. It works well otherwise just stops at 2 Lo. Like 4Lo isn't there at all. The transfer is a 79 model if that is of any help. I will mess with it and see what I can get it to do. Thanks

[jeffspower]

You might unhook the rods from the t-case levers (the two that are on a shaft sticking out of the t-case) & move them thru their positions to see if they are all there. One lever will have 3 positions, high, neutral, low- & the other will have 2 positions, 2wd & 4wd. You have to pry on them a little to get them thru their detents, wheels blocked & trans in neutral will help. Rocking the rear driveshaft will help too.

If you get all positions this way, then you know its in that dam POS box.

[stan79chevy]

check to see if your shift lever is bent or binding on something. take the lever off and shift it by hand or wiht a screwdriver